Bathtub



FIG. 1 is a top plan view of a bathtub showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a perspective view taken from the top, rear and one side thereof; and

FIG. 6 is a perspective view taken from the top, front and one side thereof. 

The ornamental design for a bathtub, as shown. 